Investigation of passive and active silica-tin oxide nanostructured optical fibers fabricated by " inverse dip-coating " and " powder in tube " method based on the chemical sol-gel process and laser emission

International audienceThis paper presents a study of original nanostructured optical fibers based on the SiO 2-SnO 2-(Yb 3+) system. Two different processes have been developed and compared: the sol-gel chemical method associated to the " inverse dip-coating " (IDC) and the " powder in tube " (PIT) process. The microstructural and optical properties of the fibers are studied according to the concentration of SnO 2. X-Ray Diffraction as well as Transmission Electron Microscopy studies show that SnO 2 crystallizes into the cassiterite phase as nanoparticles with a diameter ranging from 4 to 50 nm as a function of tin oxide concentration. A comparative study highlights a better conservation of SnO 2 into the fiber core with the PIT approach according to the refractive index profile and X-Ray analysis measurement. The attenuation evaluated by the classic cutback method gives respectively values higher than 3 dB/m and 0.2 dB/m in the visible (VIS) and infrared (IR) range for the PIT fiber whereas background losses reach 0.5 dB/m in the VIS range for IDC fibers. The introduction of ytterbium ions into the core of PIT fibers, directly in the first chemical step, leads to a laser emission (between 1050 and 1100 nm) according to the fiber length under 850 nm wavelength pumping. Luminescence studies have demonstrated the influence of the tin oxide nanostructure on the rare earth optical properties especially by the modification of the absorption (850 to 1000 nm) and emission (950 to 1100 nm) by discretization of the bands, as well as on the IR emission lifetime evaluated to 10 µs

invited paper n°10512-26

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Nanojoule 100 fs Pulse at 3 µm Generated From a Fully Fusion-Spliced Fiber Laser

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Luminescence d'une fibre nanocomposite SiO2/ZrO2 sous excitation UV

National audienceCet article présente l'étude de la luminescence de fibres optiques présentant un cœur nanocomposite dans le système SiO2-ZrO2 et SiO2-ZrO2 :Er3+ sous l'effet d'un pompage dans l'ultraviolet. Les spectres d'émission correspondant sont présentés et une explication des mécanismes à l'origine de ces phénomènes est proposée

All-Fiber System at 1750 nm Delivering 35 fs 230 kW Peak Power Pulses

International audienceUltra-short (1.55 μm) are very attractive for many applications such as three-photon microscopy, frequency metrology, or high harmonic generation. Solitonic self-compression is an attractive effect for this purpose as compression to sub-50 fs pulses can be achieved without the need for external compressing optics, directly out of an optical fiber. Self-compression at high energy was demonstrated around 2 μm in all-solid or gas-filled hollow-core-PCFs. However, the latter demonstrations were restricted to Tm emission band in order to reach the soliton self-compression effect in low-nonlinearity media. In this communication, we present a compact monolithic all-fiber source of ultrashort (35 fs) pulses emitting outside conventional lasing bands, from 1.65 to 2 μm based on Raman-induced soliton self-frequency shift (SSFS) and soliton self-compression (SSC

Mid-infrared supercontinuum generation seeded by geometrical parametric instabilities amplified in TDFA

International audienceWe demonstrate thulium-doped fiber amplification of sub-nanosecond pulses generated at 1870 nm by exploiting spatiotemporal nonlinear dynamics in graded-index multimode fibers. The microjoule pulses at 1870 nm trigger supercontinuum generation in InF3 fiber

Modal analysis of a 50 μm core diameter photonic bandgap Bragg fiber operated at 1860 nm

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Nanostructured optical fibers in the SiO2/SnO2 system by the sol-gel method

International audienceSiO2/SnO2 nanostructured optical fibers are elaborated using two ways based on the chemical sol-gel method: the "inverse-dip coating" and the "powder in tube" processes. The structural and waveguiding properties of the drawn optical fibers are studied according to the concentration of SnO2 nanocrystals. In this way, the study on the 450-1750 nm wavelength range shows that the transmission band expands to the infrared wavelength as the SnO2 concentration increases and the measured attenuation losses are below 1 dB m-

First demonstration of a laser emission in hybrid nanostructured optical fibres based on SiO2/SnO2 system doped by ytterbium ions

International audienceIn this contribution we demonstrate the first fabrication of SiO2 - SnO2 nanostructured optical fibre. The incorporation of ytterbium ions leads to an original laser emission

Emission laser dans une fibre hybride nanostructurée silice zircone dopée ytterbium

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